Harry L. Curtis, 76, a founder of a moving and storage company, a furniture company and a real estate company, died of heart and lung failure Sunday at Southern Maryland General Hospital in Clinton.

Mr. Curtis, a lifelong resident of the Washington areas, attended Wood's College and the Emerson Institute in Washington. He worked for a laundry and then for the D. C. government until 1931, when he and his four brothers founded the Curtis Brothers Moving and Storage Co. In 1949, they formed the Curtis Brothers Furniture Co., of which Mr. Curtis became president in 1761. In 1974, the firm switched to real estate as Curtis Properties Inc. and Mr. Curtis was the chairman of its board at the time of his death.

Mr. Curtis was a former board member of the Nathional Bank of Washington.

He also was a president of the board of the Immanuel Methodist Church in Horsehead, Md., a member of the Anacostia Masonic Lodge No. 21, a trustee of the Cafritz Memorial Hospital, now Greater Southeast Community Hospital, and a president of the Waldorf-Brandywhine Lion's Club.

Survivors include his wife, Rena I., of the home in Brandywine; a son, Charles, of Atlanta; a daughter, Patricia Brooks, of Carrollton, Md.; a brother, George T. Jr., of Brandywine; 11 grandchildren, and three great-grandchildren.